I'd like to get a weather sealed set up (eg Olympus OMD), but it's pointless without a weather sealed lens

The options for native lenses for this format are pretty limited. I just want a couple of wide/normal weather sealed primes. I could use the Olympus 4/3 50mm macro, but it's too long, and requires a converter. A native version would certainly be smaller.

Are there any examples of cameras or lenses available as weather sealed and non-weather sealed versions? Fro example, there are stabilised and non-stabilised versions of certain Canikon lenses, iirc.

I'm just curious how much more a weather sealed version of popular lenses (eg Olumpus 17mm 1.8 or Panasonic 25mm 1.4) would cost. I don't understand why m4/3, despite having 3 weather sealed bodies, still has few lenses usable in the rain (4 zooms and 1 long macro prime)

I could go the Canikon/Pentax route, but I dumped my DSLR kit a few years back and I'm never going back.